Simultaneous cooling and trapping of ^85Rb and ^87Rb in a magneto-optical trap

Süptitz, Wenko; Wokurka, G.; Strauch, F.; Kohns, P.; Ertmer, W.

doi:10.1364/ol.19.001571

Cited by 45 publications

(29 citation statements)

References 8 publications

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“…The laser lines for the dual-species experiment are synthesized by phase modulation at 1560 nm. [22] do not exceed 10-15% in our case. These results show that the additional laser lines do not have any significant impacts on the cooling efficiency.…”

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confidence: 47%

Simultaneous dual-species matter-wave accelerometer

et al. 2013

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We report the realization of a matter-wave interferometer based on Raman transitions which simultaneously interrogates two different atomic species ( 87 Rb and 85 Rb). The simultaneous aspect of our experiment presents encouraging preliminary results for future dual-species atom interferometry projects and seems very promising by taking advantage of a differential acceleration measurement. Indeed the resolution of our differential accelerometer remains lower than 3.9 × 10 −8 g even with vibration levels up to 1 × 10 −3 g thanks to common-mode vibration noise rejection . An atom based test of the Weak Equivalence Principle has also been carried out leading to a differential free fall measurement between both isotopes of ∆g/g = (1.2 ± 3.2) × 10 −7 .Light pulse atom interferometers [1, 2] have proven to be very high performance sensors with the development in the last decades of cold atom gravimeters [3], gravity gradiometers [4] and gyroscopes [5]. In addition to the undeniable contribution they could bring in practical applications such as inertial navigation and geophysics, they appear very promising for exploring fundamental physics such as for the determination of the fine structure constant [6], the gravitationnal constant [7,8], but also for testing the Einstein's theory of general relativity with quantum objects [9]. In that field, atom interferometers seem notably promising for detecting gravitational waves [10], exploring short range forces [11,12] and testing the Weak Equivalence Principle (WEP) [13].In the context of testing the WEP, some projects under development aim to measure the acceleration of two different atomic species during few seconds of free fall in order to achieve highly sensitive measurements as it can be obtained in 10 m tall atomic fountains [9], drop towers [14], sounding rockets, parabolic flights [15] and satellites [16]. To date, a single atom based ground test of the WEP was carried out by alternatively handling both isotopes of rubidium [13]. This method, providing a non simultaneous differential measurement, exhibit a sensitivity limited by vibration noise, such as state of the art gravimeters [17,18]. A special interest must thus be paid to develop atom interferometers which will simultaneously interrogate two different atomic species in order to take full advantages of a differential measurement and to achieve the targeted sensitivity and accuracy.

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confidence: 47%

Simultaneous dual-species matter-wave accelerometer

et al. 2013

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“…The switch-off time is short compared to the dynamics of the expanding cloud (we see no variation in the ion signal during the switch off period) and we switch the light on long enough (200 ms) to recapture the cloud and allow it to equilibrate. Equation (14) describes the ion production rate in the dark of our TIMOT; a similar equation describes the ion production rate of a single-isotope MOT, φ MOT . By combining the equations for φ T IMOT and φ MOT with a measurement of the ratio r = (φ T IMOT − φ bgr )/(φ MOT − φ bgr ) (where the time dependance of the measured signals has been omitted because of the short duration of the switch-off period), we can derive an expression for K 34 .…”

Section: Determination Of the Heteronuclear Loss Ratementioning

confidence: 99%

Heteronuclear ionizing collisions between laser-cooled metastable helium atoms

et al. 2007

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We have investigated cold ionizing heteronuclear collisions in dilute mixtures of metastable (2 3 S1) 3 He and 4 He atoms, extending our previous work on the analogous homonuclear collisions [R. J. W. Stas et al., PRA 73, 032713 (2006)]. A simple theoretical model of such collisions enables us to calculate the heteronuclear ionization rate coefficient, for our quasi-unpolarized gas, in the absence of resonant light (T = 1.2 mK): K (th) 34 = 2.4×10 −10 cm 3 /s. This calculation is supported by a measurement of K34 using magneto-optically trapped mixtures containing about 1×10 8 atoms of each species, K (exp) 34 = 2.5(8)×10 −10 cm 3 /s. Theory and experiment show good agreement.

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“…Previously several groups have studied samples of two atomic species in a magneto-optical trap (MOT) [11]. In this article we describe the first realization of a MOT containing both fermionic and bosonic lithium and its optimization for sympathetic cooling.…”

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confidence: 99%